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Frequency distribution of the last visit to dentist in groups under studying in second phase
| Last visiting to dentist | Case | Control | Total | |||
|---|---|---|---|---|---|---|
|
| ||||||
| n | % | n | % | n | % | |
| Have not visited dentist yet | 0 | 0 | 20 | 16.9 | 20 | 8.5 |
| Less than 3 months ago | 0 | 0 | 7 | 5.9 | 7 | 3 |
| 4 to 6 months ago | 113 | 96.6 | 7 | 5.9 | 120 | 51.1 |
| 7 to 12 months ago | 4 | 3.4 | 29 | 24.6 | 33 | 14 |
| Over 1 year ago | 0 | 0 | 55 | 46.6 | 55 | 23.4 |
| Total | 117 | 100 | 118 | 100 | 235 | 100 |
X2 test (P<0/000)
